Final answer:
The person described in the question is John E. Kennedy, a 'reason-why' copywriter known for his work with Lucky Strike. He believed that the headline was 90% of the ad and stressed the importance of writing a headline first.
Step-by-step explanation:
The person described in the question is John E. Kennedy. Kennedy was a 'reason-why' copywriter who wrote for Lord & Thomas and was hired by Lucky Strike to win the competitive cigarette battle. He believed that the headline was 90% of the ad and emphasized the importance of writing a compelling headline first. He also emphasized the use of illustrations, specifically cartoons, to complement the headline.